Lapsed Mar 15, 2026 on the fee record · Low confidence
20-year base term ends Mar 31, 2037
First maintenance fee unpaid; grace period ended.
Held by Fiberlean Technologies Limited
Filed Aug 27, 2020 as application 17/004,333 · Granted Mar 15, 2022
Base term, 20 years from filing
Today
Lapsed Mar 15, 2026
2017
2037
Clock starts
Mar 31, 2017
Mar 31, 2017
No longer in force
Mar 15, 2026
Mar 15, 2026
Granted
Mar 15, 2022
Mar 15, 2022
Term would have run to
Mar 31, 2037
Mar 31, 2037
base term
after the term ends
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
None
Term adjustment
No prosecution delay on this record.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 10,801,162, to Mar 31, 2037. The term already ends on or before that date, so the cap shortened nothing.
0 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
7
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Mar 31, 2037: its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. Confidence: Low. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Mar 31, 2017, when application 15/475,487, the earliest non-provisional in its chain, was filed (this one was filed Aug 27, 2020); a parent in its chain could not be resolved (the next row) | Mar 31, 2037 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 10,801,162) | resolves to Mar 31, 2037, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 0 of 3 maintenance fees paid | lapsed Mar 15, 2026 | High confidence |
| Further caveats on record | The record names parents not resolved: 15475487, 15475487 | Low confidence overall | Low confidence |
| Computed term end | The steps above, in order | Mar 15, 2026 | Low confidence |
This family
| US 10,214,859 | In force Mar 2037 | Mar 2037 |
| US 10,801,162 | In force Mar 2037 | Mar 2037 |
| US 11,274,399 | this patent Mar 2026 | Mar 2026 |
| US 11,846,072 | In force Mar 2037 | Mar 2037 |
| US 11,732,421 | In force Mar 2037 | Mar 2037 |
| US 12,203,223 | In force Mar 2037 | Mar 2037 |
| Application 18/387,681 | Abandoned not computed | not computed |
The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Jan 27, 2021 Reel 55041, frame 940 | Svending, Per; Phipps, Jonathan; Kritzinger, Johannes; Larson, Tom; Selina, Tania; Skuse, David | Fiberlean Technologies Limited | Assignment of Assignor's Interest |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
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Alerts on its grants, lapses and transfers.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 10,801,162, ends no earlier than this term, so it caps nothing.
Citations
10
later US patents cite this one
That is top 25% of utility patents granted in 2022 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.